Bentley WaterGEMS CONNECT Edition Help

Variable Speed Pump Battery Attributes

  • ID: Unique identifier assigned to this element.
  • Label: Descriptive label for this element.
  • Notes: Additional information about this element.
  • GIS-IDs: List of associated IDs on the GIS/data-source side.
  • Hyperlinks: Associate one or more web link, photo, word processing document, or other file with this element.
  • Battery Pump Definition: Select pump definition for the lead and lag pumps in the battery.
  • Control Node: The node that the battery checks to determine whether to increase, maintain, or decrease its relative speed factor.
  • Hydraulic Grade (Target): The Head that the battery will attempt to maintain for the Control Node.
  • Relative Speed Factor (Maximum): The highest relative speed factor that the pump can be set at to meet the target head at the control node. If the target head cannot be met when the pump is set at the maximum relative speed factor, the maximum will be used.
  • Lag Pump Count: Number of lag pumps (identical to the lead pump) whose relative speed factor is adjusted to maintain the target head for a target head VSPB. (Lag pumps are not used for constant flow VSPBs).
  • Control Node on Suction Side?: Specifies if the VSPB has a suction side control node.
  • Target Flow: The relative speed of the lead pump will be adjusted to meet the Flow (Target). (Lag pumps are not used for constant flow VSPBs).
  • VSBP Type: Choices: Target Head, Fixed Flow
  • Number of Running Lag Pumps (Initial): The initial number of running lag pumps for the transient simulation.
  • Relative Speed Factor (Initial): Determines the initial speed of the pump impeller relative to the speed at which the pump curve is defined.
  • Status (Initial): Choices: On, Off
  • Include in Energy Calculation?: If set to true, cost generated by the element will be included in the calculations, otherwise they will be excluded.
  • Energy Pricing: Specify which energy pricing definition is to be used when calculating costs of the corresponding pump.
  • Diameter (Pump Valve): Diameter refers to the valve at full opening, typically equal to the internal diameter of the discharge flange.
  • Flow (Nominal): Rated or duty flow for the pump, often at or near the best efficiency point.
  • Head (Nominal): Rated or duty head for the pump, often at or near the best efficiency point.
  • Relative Speed (Initial, Transient): The initial pump relative speed to be used in the transient analysis.
  • Torque (Nominal): Specifies the nominal torque that, when multiplied by the Operating Rule's pattern multiplier values will result in the torque values used by the engine.
  • Pump Type (Transient): Choices: Shut Down After Time Delay, Constant Speed - No Pump Curve, Constant Speed - Pump Curve, Variable Speed/Torque, Pump Start - Variable Speed/Torque
  • Time (Delay until Shut Down): Time at which power to pump motor is shut off. By default, there is no time delay.
  • Time (For Valve to Close): The time taken for the pump discharge control valve to close after the transient simulation begins.
  • Time (For Valve to Operate): Time to close check valve (or to open it if initial flow is zero). If the check valve allows flow only in one direction, enter 0.
  • Control Variable: Choices: Speed, Torque
  • Status (Initial, Transient): Choices: On, Off
  • Pump Valve Type: Choices: Check Valve, Control Valve
  • Operating Rule: Specifies the operation of the valve during a transient simulation.
  • Report Period (Transient): Number of time steps between successive printouts of operation. By default, this printout is suppressed.
  • Pump Station: The Pump Station to which this Pump belongs.
  • Elevation: Elevation at centroid of junctions, valves, and pumps; the ground elevation at tanks; the hydraulic grade at reservoirs.
  • Concentration (Initial): Specify the initial concentration for the global concentration at the selected element.
  • Age (Initial): Specify the initial age of the fluid at the selected element.
  • Installation Year: Specify the install year of the element. It does not affect the calculations.
  • Trace (Initial): Specify the initial trace amount at the current location.
  • Zone: Specify the zone for the element.
  • Flow (Lead Pump): Flow contributed by the lead pump in the pump battery.
  • Number of Running Lag Pumps: Number of pump battery lag pumps running duing the current time step.
  • Lag Pump Results: The collection of results for each lag pump in the battery.
  • Relative Speed Factor (Calculated): Current relative speed factor of pump at current time step.
  • Hydraulic Grade (Suction): Calculated hydraulic grade at suction side of the pump.
  • Hydraulic Grade (Discharge): Calculated hydraulic grade at discharge side of the pump.
  • Flow (Total): Total flow pumped by standard pump or the pump battery.
  • Pump Head: Head gain between suction and discharge side of the pump.
  • Pressure (Suction): Calculated pressure at suction side of the pump.
  • Pressure (Discharge): Calculated pressure at discharge side of the pump.
  • Flow (Absolute): The magnitude of flow through the pump regardless of flow direction.
  • Pump Exceeds Operating Range?: Is true if the system demands on the pump exceeds its capabilities.
  • Status (Calculated): Choices: On, Off, Pump Cannot Deliver Head (Closed), Pump Result Cannot Deliver Flow (Open)
  • Peak Power: Displays the peak energy usage, as calculated during the extended period simulation. This result is displayed even if Peak Demand Charges are not applied.
  • Time of Peak Energy Cost: Time when energy cost is maximum.
  • Demand Charge: The charge applied per kW.
  • Demand Charge Period: Time over which demand charge is averaged in order to get $/day.
  • Peak Power Cost: Displays the energy cost as calculated during the extended period simulation. If no Peak Demand Charge has been applied to the associated Energy Price Definition, this field will display as zero.
  • Peak Power Cost (Daily): The cost associated with the Peak Demand Charge.
  • Volume Pumped (Incremental): Total volume of flow pumped during current time step.
  • Volume Pumped (Cumulative): Total volume of flow pumped up to the current time step.
  • Water Power: The amount of energy transferred to the water by the pump.
  • Pump Efficiency: The Pump Efficiency value is representative of the ability of the pump to transfer the mechanical energy generated by the motor to Water Power.
  • Wire to Water Efficiency: The ratio of the Water Power to the Wire Power.
  • Wire Power: The amount of energy delivered to the pump motor.
  • Energy Used (Incremental): Total energy used during current time step.
  • Energy Used (Cumulative): Total amount of energy used up to the current time step.
  • Energy Price: Cost per unit of energy.
  • Energy Cost (Incremental): The energy cost during the current time step.
  • Energy Cost (Cumulative): The total energy cost up to the current time step.
  • Cost per Unit Volume: Cost per unit of volume pumped for current time step.
  • Relative Speed Factor (Energy Cost Engine): Relative speed of pump at current time step.
  • Motor Efficiency: The Motor Efficiency value is representative of the ability of the motor to transform electrical energy to rotary mechanical energy.
  • Time of Use: The amount of time the pump is turned on over the course of the simulation.
  • Utilization: Percentage of total time during the EPS that the pump was On.
  • Volume Pumped (Total): The total volume of fluid pumped during the simulation.
  • Water Power (Average): The average amount of energy transferred to the water by the pump over the course of the simulation.
  • Pump Efficiency (Average): The average pump efficiency during the simulation.
  • Wire to Water Efficiency (Average): The average ratio of the Water Power to the Wire Power.
  • Wire Power (Average): The average amount of energy delivered to the pump motor during the simulation.
  • Energy Usage (Total): The total energy used during the simulation.
  • Energy Use Cost (Total): Total cost of energy used during simulation.
  • Energy Usage (Daily): Amount of energy used during a 24-hour period.
  • Energy Use Cost (Daily): The cost of the energy used during a 24-hour period, determined by the calculated energy usage and the energy pricing pattern.
  • Cost per Unit Volume (Summary): Cost per unit of volume pumped over course of simulation.
  • Head (Shutoff): Displays the shutoff head of the referenced pump definition if applicable.
  • Head (Design): Displays the design head of the referenced pump definition if applicable.
  • Flow (Design): Displays the design flow of the referenced pump definition if applicable.
  • Head (Maximum Operating): Displays the maximum operating head of the referenced pump definition if applicable.
  • Flow (Maximum Operating): Displays the maximum operating flow of the referenced pump definition if applicable.
  • Flow (Maximum Extended): Displays the maximum extended flow of the referenced pump definition if applicable.
  • Age (Calculated): Age at selected element for current time step.
  • Trace (Calculated): Trace at selected element for current time step.
  • Concentration (Calculated): Concentration at selected element for current time step.
  • Has Calculation Messages Now?: If true then the current element has associated calculation warning messages for the current time step.
  • Is Closed?: True if the current element is closed during the current time step.
  • Is Open?: Set to true if open during the current time step.
  • Is Initially Closed?: If true, the initial condition for the control element is "Closed" or "Off."
  • Controlled?: Is true if a control action in the current control set references the selected element.
  • Cannot Deliver Flow or Head?: If true then the cannot deliver head or cannot deliver flow warning was generated for the element for the current time step.
  • Head (Maximum, Transient): Maximum head at node over the course of the transient simulation.
  • Head (Minimum, Transient): Minimum head at node over the course of the transient simulation.
  • Pressure (Maximum, Transient): Maximum pressure at node over the course of the transient simulation.
  • Pressure (Minimum, Transient): Minimum pressure at node over the course of the transient simulation.
  • Air Volume (Maximum, Transient): Maximum air volume at node over the course of the transient simulation. Not applicable to Reservoirs and Rating curves.
  • Vapor Volume (Maximum, Transient): Maximum vapor volume at node over the course of the transient simulation. Not applicable to Reservoirs and Rating curves.